"In this masterpiece, Jamil Zaki weaves together the very latest science with stories that will stay in your heart forever."--Angela Duckworth, author of Grit Empathy is in short supply. We struggle to understand people who aren't like us, but find it easy to hate them. Studies show that we are less caring than we were even thirty years ago. In 2006, Barack Obama said that the United States was suffering from an "empathy deficit."...